Indian wildcard Yuki Bhambri delighted home fans with a 6-4 6-3 win over Pablo Carreno Busta, who had been voted the ATP's most improved player for 2013 after jumping 650 places in the rankings.

The Spaniard, ranked 64 against Bhambri's 195, was unable to settle down against the Indian's aggressive play and went out in his first appearance in the tournament.

Chennai-based Ramkumar Ramanathan, playing his maiden ATP Tour match, gave local fans another reason to celebrate when he came from behind to stun better-known compatriot and India's top player Somdev Devvarman 4-6 6-3 6-4.

The top four seeds - Stanislas Wawrinka, Mikhail Youzhny, Fognini and Benoit Paire - will be seen in action from Wednesday after being handed first-round byes.